IGCSE 化学2016预测试卷.pdf

The syllabus is accredited for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate. This document consists of 18 printed pages. UCLES 2014 Turn over *0123456789* Cambridge International Examinations Cambridge International General Certificate of Secondary Education CHEMISTRY 0620/02 Paper 2 Multiple Choice (Extended) For Examination from 2016 SPECIMEN PAPER 45 minutes Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you. DO NOT WRITE IN ANY BARCODES. There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 18. Electronic calculators may be used. 2 UCLES 2014 0620/02/SP/16 1 Amino acids are colourless and can be separated and identified by chromatography. beaker glass cover solvent chromatography paper What additional apparatus is required to identify the amino acids present in a mixture? A a locating agent B a ruler C a ruler and a locating agent D neither a ruler or a locating agent 2 The diagram shows the diffusion of hydrogen chloride and ammonia in a glass tube. The gases are given off by the solutions at each end of the tube. When hydrogen chloride and ammonia mix they produce a white solid, ammonium chloride. Which line shows where the white solid is formed? ABCD cotton wool soaked in concentrated ammonia solution cotton wool soaked in concentrated hydrochloric acid 3 UCLES 2014 0620/02/SP/16 Turn over 3 The diagram shows the structure of an atom. + + key = proton = neutron = electron + n n n Which diagram shows the structure of an isotope of this atom? + n A + nn B + n + nn C + n + nn D 4 The table shows the structure of different atoms and ions. particle proton number nucleon number number of protons number of neutrons number of electrons Mg 12 24 12 W 12 Mg2+ X 24 12 12 10 F 9 19 9 Y 9 F 9 19 9 10 Z What are the values of W, X, Y and Z? W X Y Z A 10 10 9 9 B 10 12 10 9 C 12 10 9 10 D 12 12 10 10 4 UCLES 2014 0620/02/SP/16 5 Iron is a metal. The structure of iron is described as a lattice of positive ions in a sea of electrons. Which of the following statements about iron are correct? 1 iron conducts electricity because the electrons are free to move 2 iron has a high melting point due to the strong covalent bonds 3 iron is an alloy 4 iron is malleable because the layers of atoms can slide over one another A 1 only B 1 and 3 C 1 and 4 D 2, 3 and 4 6 Which two elements react together to form an ionic compound? element electronic structure R T X Z 2,4 2,8 2,8,1 2,8,7 A R and T B T and X C X and Z D Z and R 7 Ethene is an unsaturated hydrocarbon. H H H H CC Which description of the bonding in ethene is correct? A All atoms in the molecule have a share of eight electrons. B Each carbon atom shares two of its electrons with hydrogen atoms and two of its electrons with a carbon atom. C Each carbon atom shares two of its electrons with hydrogen atoms and one of its electrons with a carbon atom. D The two carbon atoms share a total of six electrons with other atoms. 8 What is the relative molecular mass, Mr, of butanol? A 15 B 37 C 74 D 148 5 UCLES 2014 0620/02/SP/16 Turn over 9 The chemical formulae of two substances, W and X, are given. W NaAl Si3O8 X CaAl2Si2O8 Which statements are correct? 1 W and X contain the same amount of oxygen. 2 W contains three times as much silicon as X. 3 X contains twice as much aluminium as W. A 1 and 2 B 1 and 3 C 2 and 3 D 1, 2 and 3 10 What is the concentration of a solution containing 1.0 g of sodium hydroxide in 250 cm3 of solution? A 0.025 mol / dm3 B 0.10 mol / dm3 C 0.25 mol / dm3 D 1.0 mol / dm3 11 Four students prepared hydrated copper(II) sulfate by adding an excess of dilute sulfuric acid to copper(II) oxide. Each student used a different mass of copper(II) oxide. dilute sulfuric acid CuO CuSO4.5H2O Mr = 80 Mr = 250 After the copper(II) sulfate had crystallised the students dried and weighed the crystals. Which student produced the highest percentage yield of hydrated copper(II) sulfate? mass of copper(II) oxide used / g mass of crystals produced / g A 4.0 11.5 B 8.0 23.5 C 12.0 35.0 D 16.0 46.5 6 UCLES 2014 0620/02/SP/16 12 20 cm3 of ethyne, C2H2, are reacted with 500 cm3 of oxygen. The equation for the reaction is 2C2H2(g) + 5O2(g) 4CO2(g) + 2H2O(l) What is the total volume of gas remaining at the end of the reaction? (all volumes are measured at room temperature and pressure) A 400 cm3 B 450 cm3 C 490 cm3 D 520 cm3 13 Different metals were tested using the apparatus shown. metal 1 V metal 2 Which pair of metals would produce the largest voltage? A copper and silver B magnesium and silver C magnesium and zinc D zinc and copper 14 Three electrolysis cells are set up. Each cell has inert electrodes. The electrolytes are listed below. cell 1 aqueous sodium chloride cell 2 dilute sulfuric acid cell 3 molten lead(II) bromide In which of these cells is a gas formed at both electrodes? A 1 and 2 B 1 and 3 C 2 only D 3 only 7 UCLES 2014 0620/02/SP/16 Turn over 15 The statements refer to the electrolysis of concentrated copper(II) chloride solution. 1 Electrons are transferred from the cathode to the copper(II) ions. 2 Electrons move around the circuit from the cathode to the anode. 3 Chloride ions are attracted to the anode. 4 Hydroxide ions transfer electrons to the cathode. Which statements about the electrolysis of concentrated copper(II) chloride are correct? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4 16 Water can be used to produce hydrogen gas. 2H2O 2H2 + O2 Which row describes bond breaking in the reactant? A B C D endothermic endothermic exothermic exothermic heat absorbed heat released heat absorbed heat released 17 Dinitrogen tetroxide, N2O4, breaks down into nitrogen dioxide, NO2. N2O4(g) 2NO2(g) The reaction is reversible and endothermic. Which conditions will give the largest yield of nitrogen dioxide, NO2? temperature pressure A B C D high high low low high low high low 8 UCLES 2014 0620/02/SP/16 18 The apparatus shown can be used to measure the rate of some chemical reactions. gas syringe reaction mixture For which two reactions would this apparatus be suitable? reaction 1 AgNO3(aq) + HCl(aq) AgCl(s) + HNO3(aq) reaction 2 2H2O2(aq) 2H2O(I) + O2(g) reaction 3 MgO(s) + 2HCl(aq) MgCl2(aq) + H2O(I) reaction 4 ZnCO3(s) + 2HCl(aq) ZnCl2(aq) + CO2(g) + H2O(I) A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4 19 A student investigates the rate of reaction between magnesium and excess sulfuric acid. The volume of hydrogen given off in the reaction is measured over time. The graph shows the results of two experiments, R and S. R S volume of hydrogen given off time Which change in conditions would cause the difference between R and S? A A catalyst is added in S. B The acid is more concentrated in R than in S. C The magnesium is less finely powdered in R than in S. D The temperature in R is lower than in S. 9 UCLES 2014 0620/02/SP/16 Turn over 20 Which of these reactions shows only reduction? A Cu2+ + 2e ? Cu B Fe2O3 + 3CO ? 2Fe + 3CO2 C HCl + NaOH ? NaCl + H2O D Mg + ZnSO4 ? Zn + MgSO4 21 The red colour in some pottery glazes may be formed as a result of the reactions shown. CuCO3CuO + CO2 CuO + SnOCu + SnO2 heat These equations show that 1 is oxidised and 2 is reduced. Which substances correctly complete gaps 1 and 2 in the above sentence? 1 2 A B C D CO2 CuCO3 CuO SnO SnO2 CuO SnO CuO 22 Acids are compounds which donate protons (hydrogen ions). NH3(aq) + H2O(l) NH4+(aq) + OH(aq) Which compound in this equation is behaving as an acid? A ammonia B ammonium hydroxide C none of them D water 10 UCLES 2014 0620/02/SP/16 23 The reactions of four different oxides W, X, Y and Z are shown. W reacts with hydrochloric acid but not sodium hydroxide. X reacts with both hydrochloric acid and sodium hydroxide. Y does not react with either hydrochloric acid or sodium hydroxide. Z reacts with sodium hydroxide but not hydrochloric acid. Which row shows the correct types of oxide? acidic basic amphoteric neutral A B C D W X Z Z Z Y X W X W Y X Y Z W Y 24 A solution contains barium ions and silver ions and one type of anion. What could the anion be? A chloride only B nitrate only C sulfate only D chloride or nitrate or sulfate 25 A mixture containing two anions was tested and the results are shown below. test result dilute nitric acid added effervescence of a gas which turned limewater milky dilute nitric acid added, followed by aqueous silver nitrate yellow precipitate formed Which anions were present? A carbonate and chloride B carbonate and iodide C sulfate and chloride D sulfate and iodide 11 UCLES 2014 0620/02/SP/16 Turn over 26 Part of the Periodic Table is shown. The letters are not the chemical symbols of the elements. W ZY X Which statement about the elements is not correct. A W has two electrons in the outermost shell. B Y is in Group IV of the Periodic Table. C X and Y bond covalently to form a molecule XY4. D Z has more metallic character than Y. 27 Astatine is an element in Group VII of the Periodic Table. It has only ever been produced in very small amounts. What are the likely properties of astatine? colour state reaction with aqueous potassium iodide A B C D black dark brown green yellow solid gas solid liquid no reaction brown colour no reaction brown colour 12 UCLES 2014 0620/02/SP/16 28 The table shows the results of adding three metals, P, Q and R, to dilute hydrochloric acid and to water. metal dilute hydrochloric acid water P Q R hydrogen produced no reaction hydrogen produced hydrogen produced no reaction no reaction What is the order of reactivity of the metals? most reactive least reactive A B C D P P R R R Q Q P Q R P Q 29 Compound X is heated with carbon using the apparatus shown. heat compound X and carbon reaction tube limewater A brown solid is formed in the reaction tube and the limewater turns cloudy. What is compound X? A calcium oxide B copper(II) oxide C magnesium oxide D sodium oxide 13 UCLES 2014 0620/02/SP/16 Turn over 30 Zinc is extracted from zinc blende. Zinc blende is an ore of zinc and consists mainly of zinc sulfide. One of the steps in the process involves zinc sulfide reacting with oxygen from the air. What is the equation for this reaction? A 2ZnS + 3O2 2ZnO + 2SO2 B 2ZnS + O2 2Zn + SO2 C 2ZnS + O2 2ZnO + S D ZnS + 2O2 ZnSO4 31 The diagram shows the carbon cycle. coal, oil and natural gas gradual production of fossil fuels carbon dioxide in atmosphere X Which process is shown by the arrow marked X? A combustion B photosynthesis C respiration D transpiration 14 UCLES 2014 0620/02/SP/16 32 A catalytic converter removes harmful gases from motor car exhausts. Which reaction does not take place in a catalytic converter? A 2CO + O2 2CO2 B N2 + 2CO2 2NO + 2CO C 2NO2 N2 + 2O2 D 2NO2 + 4CO N2 + 4CO2 33 The diagram shows some reactions of substance Y. substance Y a salt ammonia heat with an ammonium compound heat with dilute acid Which type of substance is Y? A an alcohol B a base C a catalyst D a metal 15 UCLES 2014 0620/02/SP/16 Turn over 34 Which row shows the conditions for the manufacture of sulfuric acid? pressure / atm temperature / C catalyst A B C D 2 2 200 200 450 250 450 250 vanadium(V) oxide iron iron vanadium(V) oxide 35 Air containing an acidic impurity was neutralised by passing it through a column containing substance X. acidic airneutralised air substance X What is substance X? A calcium oxide B sand C sodium chloride D concentrated sulfuric acid 16 UCLES 2014 0620/02/SP/16 36 In an oil refinery, petroleum is separated into useful fractions. The diagram shows some of these fractions. refinery gases gasoline X diesel oil Y Z 400 C pre-heat What are fractions X, Y and Z? X Y Z A B C D fuel oil fuel oil paraffin (kerosene) paraffin (kerosene) bitumen paraffin (kerosene) bitumen fuel oil paraffin (kerosene) bitumen fuel oil bitumen 37 Which reaction does not take place in the dark?